diff --git a/drivers/unix/ip_unix.cpp b/drivers/unix/ip_unix.cpp
index ac7195abc17..cf47cdc7e88 100644
--- a/drivers/unix/ip_unix.cpp
+++ b/drivers/unix/ip_unix.cpp
@@ -152,7 +152,7 @@ void IP_Unix::get_local_interfaces(Map<String, Interface_Info> *r_interfaces) co
 			Interface_Info info;
 			info.name = name;
 			info.name_friendly = hostname->DisplayName->Data();
-			info.index = 0;
+			info.index = String::num_uint64(0);
 			E = r_interfaces->insert(name, info);
 			ERR_CONTINUE(!E);
 		}